Place the toilet tank lid off to the side so it does not get in your way while you are doing the toilet bowl repairs. Now you should flush the toilet with the water being off so the toilet tank empties and you can work on the toilet chain and the flapper. You first will want to remove the chain from the toilet handle.
Definition of vat. 1  1 : a large vessel (such as a cistern, tub, or barrel) especially for holding liquors in an immature state or preparations for dyeing or tanning.
The VAT system is invoice-based. Each seller in the product chain includes a VAT charge on the buyer's invoice. Under a VAT taxation system, all sellers collect the tax and then pay it to the government. The VAT gives sellers along the supply chain a direct economic motivation to collect the tax, thereby reducing the incidence of tax evasion.